Product description
The Mark 688 Series piloted soft seat regulator is designed specifically to provide accurate pressure control on very low pressure tank blanketing systems. The pilot operated Mark 688 responds to very small changes in tank pressure by throttling open or closed to maintain the desired pressure set point.Pressure Reducing Valve MK688
Size
- 1″ – 2″ (DN25 – DN50)
Cv (Kv)
- 1″: 17; 1-1/2″: 30; 2″ 45 (DN25: 14,7; DN40 26,0; DN50 38,9)
Diaphragm Materials
- Buna-N
Body Materials
- Carbon Steel & Stainless Steel
End Connections
- ANSI Flanges 150/300 #
Maximum Inlet Pressure
- 200 psi (13,8 bar)
Features and Benefits
- Accurate regulation down to 1″ wc
- ANSI Class VI Shutoff
- Five available spring ranges
- 200 psi maximum inlet pressure
- High flows: Cv 1″ 17; 1-1/2″ 25; 2″ 45
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